Recycling nylon fiber and manufacturing method thereof

Abstract

A manufacturing method of a recycling nylon fiber includes steps as follows. A nylon fiber waste is provided, wherein the nylon fiber waste is an oiled nylon 6 fiber waste or an oiled nylon 66 fiber waste. A cutting step is performed, wherein a plurality of nylon fiber debris are formed. A washing step is performed, wherein an oil content of the nylon fiber debris is reduced to less than 0.22 wt %. A dehydrating and squeezing step is performed, wherein a plurality of nylon films are formed. A melting and granulating step is performed, wherein a plurality of recycling nylon particles are formed. A melting and spinning step is performed, wherein the recycling nylon fiber is obtained.

What is claimed is: 
     
         1 . A manufacturing method of a recycling nylon fiber, comprising:
 providing a nylon fiber waste, wherein the nylon fiber waste is an oiled nylon 6 fiber waste or an oiled nylon 66 fiber waste;   performing a cutting step, wherein the nylon fiber waste is cut so as to form a plurality of nylon fiber debris;   performing a washing step, wherein the nylon fiber debris are washed so as to reduce an oil content of the nylon fiber debris to less than 0.22 wt %;   performing a dehydrating and squeezing step, wherein moisture of the nylon fiber debris is removed so as to form a plurality of nylon films, and a moisture content of the nylon films is less than or equal to 4 wt %;   performing a melting and granulating step, wherein the nylon films are melted and granulated so as to form a plurality of recycling nylon particles; and   performing a melting and spinning step, wherein the recycling nylon particles are melted and spun so as to obtain the recycling nylon fiber.   
     
     
         2 . The manufacturing method of the recycling nylon fiber of  claim 1 , wherein the nylon fiber waste comprises a nylon 6 full-dull fiber, a nylon 6 semi-dull fiber, a nylon 6 dull fiber, a nylon 6 color fiber, a nylon 66 full-dull fiber, a nylon 66 semi-dull fiber, a nylon 66 dull fiber, a nylon 66 high-tenacity fiber, a nylon 66 high-tenacity color fiber, a nylon 66 fine denier high-tenacity fiber, a nylon 6 fish net fiber waste, a nylon 66 fish net fiber waste, a nylon 6 cloth waste or a nylon 66 cloth waste. 
     
     
         3 . The manufacturing method of the recycling nylon fiber of  claim 1 , wherein a maximum length of the nylon fiber debris ranges from 3 cm to 5 cm. 
     
     
         4 . The manufacturing method of the recycling nylon fiber of  claim 1 , wherein a washing time of the washing step ranges from 10 minutes to 20 minutes. 
     
     
         5 . The manufacturing method of the recycling nylon fiber of  claim 1 , wherein the dehydrating and squeezing step comprises:
 performing a dehydrating step, wherein the nylon fiber debris are dehydrated so as to reduce the moisture content of the nylon fiber debris to less than 10 wt %; and   performing a squeezing step, wherein the nylon fiber debris performed the dehydrating step are squeezed so as to form the nylon films.   
     
     
         6 . The manufacturing method of the recycling nylon fiber of  claim 1 , further comprising:
 performing a drying step, wherein the recycling nylon particles are dried, and the moisture content of the recycling nylon particles ranges from 300 ppm to 700 ppm.   
     
     
         7 . The manufacturing method of the recycling nylon fiber of  claim 6 , wherein the drying step is performed under a temperature ranging from 70° C. to 85° C. for 1 day to 3 day. 
     
     
         8 . The manufacturing method of the recycling nylon fiber of  claim 1 , wherein the recycling nylon fiber is a partially oriented fiber or a fully oriented fiber. 
     
     
         9 . The manufacturing method of the recycling nylon fiber of  claim 1 , wherein the melting and spinning step comprises:
 performing a melting step, wherein the recycling nylon particles are melted so as to form a spun liquid;   performing a fiber spitting step, wherein the spun liquid is passed through a spinneret plate so as to form a plurality of nascent fibers;   performing a cooling step, wherein the nascent fibers are cooled so as to form a plurality of solidified fibers;   performing a collecting and oiling step, wherein the solidified fibers are collected and oiled so as to form a bundled fiber;   performing a drawing step, wherein the bundled fiber is drawn so as to form a stretched fiber; and   performing a winding step, wherein the stretched fiber is wound around a cylindrical element so as to obtain the recycling nylon fiber.   
     
     
         10 . A recycling nylon fiber made by the manufacturing method of the recycling nylon fiber of  claim 1 .